CN114257890A - Method for dynamically adjusting issued bandwidth by EDBA - Google Patents
Method for dynamically adjusting issued bandwidth by EDBA Download PDFInfo
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- CN114257890A CN114257890A CN202111579914.4A CN202111579914A CN114257890A CN 114257890 A CN114257890 A CN 114257890A CN 202111579914 A CN202111579914 A CN 202111579914A CN 114257890 A CN114257890 A CN 114257890A
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- bandwidth
- onu
- olt
- edba
- report message
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0084—Quality of service aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0086—Network resource allocation, dimensioning or optimisation
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Abstract
The invention relates to the technical field of passive optical networks, in particular to a method for dynamically adjusting an EDBA (enhanced data ba) to send bandwidth, which is characterized in that whether a report message of an ONU is reported to be 0 or not is judged, so that the ONU is not sent with bandwidth in subsequent N-1 DBA (direct bus access) periods, and the bandwidth deducted from the ONU is distributed to other ONUs with large reports in a system, so that the throughput of the whole system is increased, and when the number of the ONUs in the system is more, the number of the ONUs without sending stream is more, and the throughput of the whole system is increased more.
Description
Technical Field
The invention relates to the technical field of passive optical networks, in particular to a method for dynamically adjusting issued bandwidth by EDBA.
Background
With the development of passive optical network (passive optical network) technology, the number of users is increasing, and the demand of users on bandwidth is also increasing, so that the indexes of optical line terminals (optical line terminals) are also increasing, the demand on bandwidth allocation of optical line terminals (optical line terminals) in different application scenes is also increasing, the demand on system throughput is higher, and the demand on time delay is smaller and better.
A complete passive optical network (passive optical network) system is composed of an optical line terminal (optical line terminal), a passive distributor (passive splitter), and an optical network unit (optical network unit), for an EP (Ethernet passive optical network) system, as shown in FIG. 2, an OLT (passive optical network) line card of the type of EPON (Ethernet passive optical network) is connected with a plurality of terminals of the type of EPON (Ethernet passive optical network), the OLT (passive optical network) uses a dynamic bandwidth distribution (dynamic bandwidth distribution) to calculate the bandwidth authorized by each OLT (passive optical network) in the system, and the bandwidth authorized by each OLT (passive optical network) to issue the bandwidth authorized by each ONU is obtained through the OLT (passive optical network) and the ONU (Ethernet passive optical network), an ONU (optical network unit) can only send various messages within the bandwidth authorization of the ONU, and tells how much bandwidth is needed by an OLT (passive optical network) by sending a report message, the reported value in the report message reports the actual requirement of the ONU (optical network unit), and the important element can be considered during the calculation of the dynamic bandwidth allocation (dynamic bandwidth allocation) of the OLT (passive optical network).
In the prior art, bandwidth is sent to the ONUs in each period, and because an EPON system is processed in a whole packet, the overhead of each ONU for registering the bandwidth is relatively large, under the condition of no service flow, each DBA period value of the OLT sends a minimum bandwidth to the ONUs for reporting report by the ONUs, and when the number of the ONUs in the system is large, the number of the ONUs without service flow is large, so that the uplink throughput of the whole system is seriously reduced.
Disclosure of Invention
The invention provides a method for dynamically adjusting the issued bandwidth by EDBA, which can improve the throughput of the whole system.
In order to achieve the purpose of the invention, the method for dynamically adjusting the issued bandwidth by the EDBA comprises the following steps:
1) the OLT receives a report message from the ONU, extracts a queue field value in the report message, and enters step 2 when the queue field value in the report message is 0);
2) the OLT judges whether the continuous periodicity cnt with the queue field value of 0 in the report message reported by the ONU is equal to a configuration threshold value or not, and if yes, the step 3 is carried out;
3) and (3) clearing the cycle number cnt, and enabling the OLT to issue the minimum bandwidth to the ONU in the step 2) in the current DBA cycle, and then entering the step 1) for circulation.
As an optimization scheme of the present invention, in step 1), if the queue field value in the report message is not 0, the method proceeds to step a):
a) the ONU enters the bandwidth calculation of the current EDBA period, and the period number cnt of the ONU is reset at the same time, and the step b) is entered;
b) after the sub-module EDBA of the OLT completes the calculation, the OLT issues GATE message broadband authorization to inform the ONU.
As an optimization scheme of the present invention, the OLT determines whether a continuous cycle count cnt with a queue field value of 0 in a report message reported by the ONU is equal to a configuration threshold, and if not, the method proceeds to step a):
A) accumulating the periodicity cnt, wherein the ONU does not enter the current bandwidth allocation, and the OLT does not send down the GATE message;
B) waiting for the bandwidth calculation of the next DBA cycle.
As an optimization scheme of the invention, the value of the configuration threshold does not exceed the timeout time of the report message.
As an optimization scheme of the invention, the DBA period refers to a period in which the OLT completes bandwidth calculation and sends GATE messages to the ONU at intervals.
The invention has the positive effects that: the EDBA dynamic adjustment registration bandwidth issuing method provided by the invention judges whether the report message of the ONU is reported as 0 or not, so that the ONU is not issued with bandwidth in the subsequent N-1 DBA periods, and the bandwidth deducted from the ONU is distributed to other ONU with large report in the system, thereby increasing the throughput of the whole system.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a flow chart of the present invention;
fig. 2 is an EPON system diagram.
Detailed Description
The implementation of the invention is described in further detail below with reference to the attached drawing figures:
a method for dynamically adjusting issued bandwidth by EDBA comprises the following steps:
1) the OLT receives a report message from the ONU, extracts a queue field value in the report message, and enters step 2 when the queue field value in the report message is 0);
2) the OLT judges whether the continuous periodicity cnt with the queue field value of 0 in the report message reported by the ONU is equal to a configuration threshold value or not, and if yes, the step 3 is carried out;
3) and (3) clearing the cycle number cnt, and enabling the OLT to issue the minimum bandwidth to the ONU in the step 2) in the current DBA cycle, and then entering the step 1) for circulation. The minimum bandwidth, namely the minimum 64byte packet length, is used for sending out the required bandwidth, and the GATE message bandwidth authorization refers to the bandwidth which is required in all the sending of a plurality of arbitrary messages.
In step 1), if the queue field value in the report message is not 0, the method proceeds to step a):
a) the ONU enters the bandwidth calculation of the current EDBA period, and the period number cnt of the ONU is reset at the same time, and the step b) is entered;
b) after the sub-module EDBA of the OLT completes the calculation, the OLT issues GATE message broadband authorization to inform the ONU.
In addition, the OLT determines whether a continuous cycle count cnt with a queue field value of 0 in a report message reported by the ONU is equal to a configuration threshold, and if not, the method proceeds to step a):
A) accumulating the periodicity cnt, wherein the ONU does not enter the current bandwidth allocation, and the OLT does not send down the GATE message;
B) waiting for the bandwidth calculation of the next DBA cycle.
The value of the configuration threshold does not exceed the timeout time of the report message. The DBA period refers to a period in which the OLT completes bandwidth calculation and issues GATE messages to the ONUs at intervals.
The configuration threshold may be any threshold as long as the timeout time of the report message is not exceeded, for example: the report message timeout time is 50ms, for example, the DBA period is set to 500us, the maximum value of the configuration threshold is no more than 100, and the larger the value configuration is, the slower the report message is issued, and the more the bandwidth is saved. And the bandwidth authorization is not sent to the ONU in a plurality of periods, and the sum of the plurality of periods cannot exceed the timeout time.
The EDBA is a part of an EPON system, dynamic bandwidth allocation is used for managing bandwidth authorization of all the ONUs by the OLT, the EDBA is a sub-module in the EPON system, the ONUs need to tell the current required bandwidth needed by the OLT, the OLT knows the required bandwidth reported by all the ONUs, the bandwidth authorization issued to each ONU is calculated according to an algorithm, the total bandwidth is fixed and not randomly allocated, and infinite bandwidth cannot be allocated to each ONU, so the OLT manages the bandwidth authorization of each ONU through the sub-module EDBA.
The value of the continuous periodicity cnt with the queue field value of 0 in the report message reported by the ONU, for example, the value of the periodicity cnt is N, that is, after the value of the queue field in the report message reported by the ONU to the OLT is 0, N DBA cycles are counted. After receiving a report, if the report value is 0, the bandwidth is not sent in the following N periods, and the ONU cannot send the report in this time, and olt waits for N periods before sending the bandwidth, and the ONU can report the report again.
The EDBA determines whether to send the minimum bandwidth for registration to the ONU or not by judging whether the queue field value in the report message of the ONU is 0 or not and configuring a continuous period N with the queue field value in the report message being 0, when the uplink service of the ONU continuously reports the report message with the queue field value being 0, the EDBA can select N periods to send the bandwidth to the ONU for sending the report message and the service message to the ONU, and the saved bandwidth can be distributed to the ONU with overlarge flow to send the uplink message, so that the throughput of the whole system can be improved.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, and therefore, the present invention should not be construed as limiting the scope of the present invention. It should be noted that several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (5)
1. A method for EDBA dynamic adjustment to send bandwidth is characterized in that: the method comprises the following steps:
1) the OLT receives a report message from the ONU, extracts a queue field value in the report message, and enters step 2 when the queue field value in the report message is 0);
2) the OLT judges whether the continuous periodicity cnt with the queue field value of 0 in the report message reported by the ONU is equal to a configuration threshold value or not, and if yes, the step 3 is carried out;
3) and (3) clearing the cycle number cnt, and enabling the OLT to issue the minimum bandwidth to the ONU in the step 2) in the current DBA cycle, and then entering the step 1) for circulation.
2. The method for dynamically adjusting delivered bandwidth by EDBA according to claim 1, wherein: in step 1), if the queue field value in the report message is not 0, the process proceeds to step a):
a) the ONU enters the bandwidth calculation of the current EDBA period, and the period number cnt of the ONU is reset at the same time, and the step b) is entered;
b) after the sub-module EDBA of the OLT completes the calculation, the OLT issues GATE message broadband authorization to inform the ONU.
3. The method of claim 2, wherein the EDBA dynamically adjusts the delivered bandwidth, and the method further comprises: the OLT judges whether a continuous periodicity cnt with a queue field value of 0 in a report message reported by the ONU is equal to a configuration threshold, and if the periodicity cnt is unequal, the step A) is carried out:
A) accumulating the periodicity cnt, wherein the ONU does not enter the current bandwidth allocation, and the OLT does not send down the GATE message;
B) waiting for the bandwidth calculation of the next DBA cycle.
4. The method of claim 3, wherein the EDBA dynamically adjusts the delivered bandwidth, and the method further comprises: the value of the configuration threshold does not exceed the timeout time of the report message.
5. The method of claim 4, wherein the EDBA dynamically adjusts the delivered bandwidth, and the method further comprises: the DBA period refers to a period in which the OLT completes bandwidth calculation and issues GATE messages to the ONUs at intervals.
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| CN202111579914.4A CN114257890A (en) | 2021-12-22 | 2021-12-22 | Method for dynamically adjusting issued bandwidth by EDBA |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114979841A (en) * | 2022-05-12 | 2022-08-30 | 苏州大学 | Method, device and system for improving uplink bandwidth utilization rate in passive optical network |
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| CN1434580A (en) * | 2002-01-25 | 2003-08-06 | 北京润光泰力科技发展有限公司 | Method for respectively treating diffevent state grade subscriber in ethernet passive optical network |
| CN101742368A (en) * | 2009-12-09 | 2010-06-16 | 华为技术有限公司 | Bandwidth allocation method and device in Ethernet passive optical network |
| CN101969584A (en) * | 2010-10-27 | 2011-02-09 | 烽火通信科技股份有限公司 | Optical network unit (ONU) energy-saving method for improving bandwidth utilization rate |
| WO2014139267A1 (en) * | 2013-03-11 | 2014-09-18 | 中兴通讯股份有限公司 | Method and system for improving bandwidth allocation efficiency |
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- 2021-12-22 CN CN202111579914.4A patent/CN114257890A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1434580A (en) * | 2002-01-25 | 2003-08-06 | 北京润光泰力科技发展有限公司 | Method for respectively treating diffevent state grade subscriber in ethernet passive optical network |
| CN101742368A (en) * | 2009-12-09 | 2010-06-16 | 华为技术有限公司 | Bandwidth allocation method and device in Ethernet passive optical network |
| CN101969584A (en) * | 2010-10-27 | 2011-02-09 | 烽火通信科技股份有限公司 | Optical network unit (ONU) energy-saving method for improving bandwidth utilization rate |
| WO2014139267A1 (en) * | 2013-03-11 | 2014-09-18 | 中兴通讯股份有限公司 | Method and system for improving bandwidth allocation efficiency |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114979841A (en) * | 2022-05-12 | 2022-08-30 | 苏州大学 | Method, device and system for improving uplink bandwidth utilization rate in passive optical network |
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